Improved fuehaoe foe eeatim bobt-blams



A.ALEXAN nan. am HEAT], m; runuA'cs;

'PATENTED ig tist. gets-1th @ffi cr i i-BEAM ALEXAND R, OF. rirrssuse; PENN LVANIA, issieuon TO ALEX-v ANDER new MANUFACTURING COMPANY. or SAME PLhGE.

etters-Patent No. 14,970,: dated Maren. 3,1868.

IMPROVED runnerees EEAIQING sonnets-use.

TO'AIQL WHOM IT MAY CONCERNr r Be it known that I, ABRAM ALEXANnEn', ,of the city of Pittsburg, in the county of Allegheny, and state of Pennsylvania, hove invented certain Improrements in Bolt-Blanks Heating-Furnace end Iido hereby decliorel that the following is' a fullond exact description tliercot', reference being to the aecompenying drawings forniing port of this specification, in whioh i i V Figure 1 represents a. perspective view of myimproved furnace for heating holt-hlunks; and

Figure Qis asection nl'elevution of thesaine through the lines; :z. I

This invention relates to an improved furnace in which blanks for m'aking'b'olts are heuted tojthe proper degree-for forming the head thereon, and the improvement consists in the construction anduse of a furnace made of the assemblage of'cnst iron boxes, or sides, cast hollow, through which water is circulated,,therehy dispensing en t irel y'i'vith the brick lining generolly used. r

' I I A Description. x v v v U is'u bed-plate or frame res'ting on proper legs or stands E EE E, and onwhich are: fastened the sidesA,

13,13 and .C of-the furnaee'proper. Allthese sides ure east hollow, or'if made of sheet iron are inede water-tight and double inithe waypf boxes. :The shape and size of the furnuceareof course tiaried to suit the peculiar kind et holtso-be hea ted in' the furnace. "-S isthe grote upon whiclitheiuel is wrest-2' D is the ash-pit and uinbox, closed 'nt bottom thetrapF Which'iis madeto pivot, as indicated by F, in dotted lines fig. 2, but a.

slide trapor hinged'door may be used and answer the same purpose. N is the pipe through which the air isforced into the 'hox D, as indicated'by the arrow, fig. 2. The front side, A, is .proirided with a. double row-of holes, RR R, & c., one above the other and on ulcvel with the lower part of the said holes R R R, the shelves .1 I are fastened. P P are bolts, which unitethe four sides of the'furnnee together; andV i sun apron or shelf, upcnrzhich the fuelis thro wn previous to being fed to the furnace. r

V My. drswing representsa, single furnace, hut two sides like A can'he placed opposite to each other, theeoal Being fedby an apron on one of the sides B, andthus double the amount of bolt-blanks may be heated in the furnace, and it inuy thus supply two machines with blanks. .H is a door for stirring the fire. LG is the hand-lo for working the trap F. i O O O are plugs for cleaning out the hollow sides and draining off the water at'plensure. Q, K, L, andM'are water-pipes, united by fittings and couplings to the sides A, B B,ar.d U,

in the manner clearly showrtby my drawings, that is, so as to conduct the water from one to the other, and to cause it to circulate through said sides. I

I i i l Operation.

Water is admitted by the pipe Q into the side A, through which it circulates, going out by thetwo pipes K and K into the two sides B endB. From thence through the pipes L and L, the water enters the backhox O,

and out through the pipe M, to be dischargedt any convenient place. The fuel is thrown on the apron V, and.

a. fire is hiridletl in the furnace onthe grate S. When, the fire reqtiires replenishing, the'heated fuel is raked from the apron V into the furnace, and a new supply of fuel may be placed on the said apron V, to be heated by the lost heat, and kept ready for use when requii'ed. The blnnlis'for meking bolts, or bolts without heads, are placed.

upon the two shelvesII', are partly thrustthrough the holes R It R,&c.,into the furnelce. I lhe blanks olf'the lower row on theshelf Iure of course heat-ed first, and ere taken out as fast as wanted to be headed in the-boltmachine. Every time a bolt-blank is taken'awuy from one of the holes in the lower row, one from the upper row of holes is taken and thrust in itsplztc'e, and ii cold bolt-blank is put in theholeleft freeon the upper row by the tithing down' of the blanks. In this manner thefire is never cooled by the introduction of cold bolt-blanksin the place where the heat lies-tube kept up-to that degree required to luring up the blanks to. properheat,

and the lost heatof the fire is employed to bring thetemperature of thecold-bolt-hlunlrs in the upper row preparatory to bringing them down to the row below, as stated above.

k My construct-ion of furnace isthen quite economicalrin point of fuel used, besides a saving of labor, which I is'considerable, as no clinkers will form nor-stick to the sides :of the furnace. v

ances now in use.

Although I have'given to fu l naee the name of bolt-heating furnace, itis evi d'ent' tha-tjit is euupted to heating iron foif manufacturing other artioies than bolts proper Pins, spikes, rivets, and in that all smaller largework requiring thetthe heat ofi the iron be applied in one piece, when the other part is kept handyfor the.workmen tolhandle, may be-wQl'kri in my imgn'oved furnace, with marked advantages over other contrive C 'Zaz'ms. I I v L Th'e bolt-blanks,heating-furnace herein described, composed ofa combination of a certain number of hoilow eastings or boxes forming thesids of the said-furnace. v i

' 2 'The side A, having two or more rows of holes R R R, &-c., and shelves I I, &c., arranged and iised for the-purpose set forth. v

3. Circulating wi tel through the hollow sides of e, furn aoet for "heatingboit bianks, for the purpose of dis,

pensing with the fire-brick lining therein.

4. :In combination with the hollow cest sides or hollow mad'hities, th'e pipes Q, K K, L L, and M, ahronged substontioliy in the manner and fot'th'e purpose specified; u 1

5 In furnaces for heating'bolt-blanks, the apron V, in oombintion with one or two of the sides of the furnacje, for the-purpose set forth. I A ALEXANDER. [L- s.]- Witnesses:

- JOHN MORRQW,

SAMUEL Melina/my, Josj. SNOWDEN. 

